title: Objective autorefraction in posterior chamber pseudophakia.
abstract: Automated refraction with the Canon RK-1 Autoref keratometer was evaluated in 110 eyes (110 patients) six to eight weeks after they had undergone extracapsular cataract extraction with posterior chamber intraocular lens implantation and achieved a best corrected visual acuity of at least 6/12. Autorefraction readings were obtained in 100 (91%) of these eyes. The agreement between autorefraction and clinical refraction data was 98% for spherical equivalence less than 0.51 dioptres (D), 95% for sphere power less than 0.51D, 94% for cylinder power less than 0.51D, and 85% for cylinder axis less than 11 degrees. Autorefraction can provide acceptably accurate postoperative refraction values in pseudophakic eyes.
authors.affiliation: Department of Ophthalmology, District General Hospital, Southport.
authors.forename: P S
authors.initials: PS
authors.lastname: Raj
authors.forename: T
authors.initials: T
authors.lastname: Akingbehin
authors.forename: A M
authors.initials: AM
authors.lastname: Levy
mesh_terms: D004864:Equipment and Supplies; D006801:Humans; D007910:Lenses, Intraocular; D008722:Methods; D011446:Prospective Studies; D012029:Refraction, Ocular